At 10:55 +0100 2003/11/05, Andreas Metzler wrote:
[...]
>There is a reason why callback stuff uses <> as sender - otherwise you
>will get loops if both systems use callback:
>
>a.example ---sends mail from foo@??? to --> bar@???
>b.example makes callback to a.example with from bar@??? to
> verify foo@???
>a.example in turn makes a callback to b.example to answer the
> callback.
>etc.
>
the etc. actually stops there as b.example will have cached the
result, unless, of course, the sender is changed at every call (very
clever indeed..). But I agree, the sender has to be <> and the
example above just shown how silly is not to accept null senders!
Giuliano
